blob: b02766597b703b375b88b42d5735266d2985337c (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
|
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_BROWSER_SPEECH_GOOGLE_ONE_SHOT_REMOTE_ENGINE_H_
#define CONTENT_BROWSER_SPEECH_GOOGLE_ONE_SHOT_REMOTE_ENGINE_H_
#include <string>
#include "base/basictypes.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "content/browser/speech/audio_encoder.h"
#include "content/browser/speech/speech_recognition_engine.h"
#include "content/common/content_export.h"
#include "net/url_request/url_fetcher_delegate.h"
namespace net {
class URLRequestContextGetter;
}
namespace content {
// Implements a SpeechRecognitionEngine by means of remote interaction with
// Google speech recognition webservice.
class CONTENT_EXPORT GoogleOneShotRemoteEngine
: public NON_EXPORTED_BASE(SpeechRecognitionEngine),
public net::URLFetcherDelegate {
public:
// Duration of each audio packet.
static const int kAudioPacketIntervalMs;
// ID passed to URLFetcher::Create(). Used for testing.
static int url_fetcher_id_for_tests;
explicit GoogleOneShotRemoteEngine(net::URLRequestContextGetter* context);
virtual ~GoogleOneShotRemoteEngine();
// SpeechRecognitionEngine methods.
virtual void SetConfig(const SpeechRecognitionEngineConfig& config) OVERRIDE;
virtual void StartRecognition() OVERRIDE;
virtual void EndRecognition() OVERRIDE;
virtual void TakeAudioChunk(const AudioChunk& data) OVERRIDE;
virtual void AudioChunksEnded() OVERRIDE;
virtual bool IsRecognitionPending() const OVERRIDE;
virtual int GetDesiredAudioChunkDurationMs() const OVERRIDE;
// net::URLFetcherDelegate methods.
virtual void OnURLFetchComplete(const net::URLFetcher* source) OVERRIDE;
private:
SpeechRecognitionEngineConfig config_;
scoped_ptr<net::URLFetcher> url_fetcher_;
scoped_refptr<net::URLRequestContextGetter> url_context_;
scoped_ptr<AudioEncoder> encoder_;
DISALLOW_COPY_AND_ASSIGN(GoogleOneShotRemoteEngine);
};
} // namespace content
#endif // CONTENT_BROWSER_SPEECH_GOOGLE_ONE_SHOT_REMOTE_ENGINE_H_
|
